38 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



ECOLOGICAL NOTES^Continned. 



Tachys. All the species occur abundantly 

 along streams, except nanus and favi- 

 cauda, which are common under bark 

 of decaying logs. 



PericompsHS ephippiahis. along the shore 

 of the Potomac. 



Pntrnhiift lonr/ioorriis, common with Ncf>rl<i 



Mij(i>tc(>r(tchnix, two specimens found some 

 years ago in the woods near ]\Iount 

 Pleasant. 



Pterosiichm. The species are more or less 

 common in the woods. Among the 

 less connnon species are ebenufi, rjillgm- 

 dits, rotiiudaius, appro.rimalus, and <jravi.'< 

 of which only two specimens were 

 found. 



Evarihrus, like Pterostichus, rather rare. 



Amara, found more or less common 

 everywhere, in woods, on hills, along 

 streams, etc. ; only rm.s'.s/.s'p/jK/ and eu- 

 preolcita are less frequent. 



Loxmidnifi, common on sw\mi\v jilaces 

 across the Free Bridge. 



Diplodiiht IftticolUs, not very common 

 along the river. 



Dicrhta, not rare under stones and logs. 



Badisier notatus and reflexus common in 

 moist places under old leaven; fidi'ipcx, 

 very rare; pulcheUufi and maculatnn 

 found only at electric lights; only two 

 specimens of the latter have been 

 found. 



C(dat}uii<, very common ever}' where. 



Platynus caudalus, very rare in moist 

 places in spring; picticornis, only one 

 specimen found at electric light; shm- 

 atus, not rare under loose bark of trees; 

 the others are all more or less common 

 under old rubbish along the streams. 



Olistlwpus parmatus, connnon; micaiis, 

 rare. 



Perigona, both species founxl once gre- 

 gariously in moist places. 



Atranus pubescens, very common under 

 old leaves in moist grounds. 



Leptotrachelns dorsali-t, not connnon. 



Casnonia pennsylvantca, extremely com- 

 mon; ludoviciana, apparently not rare 

 in swamps near Eastern Branch. 



Oaleriiajanus, very lommon, bicolor, less 

 common. 



Thalpins dorsaVm, a single specimen at 



electric light. 

 Tctragonoderua fasciatus, connnon on dry 



sand banks along streams. 

 Ncinotarsiis elegaiix, very rare; once found 



at High Island. 

 Lebia, more or less common on Howers, 



under stones, chiiis, and olil leaves; 



iiKiri/iini'oins, /i/nirillc'i, j)i.'<rnlii, and 



nbdnn,li,all.-<, nitlier rare. 

 Ciifilodcrii (ti'i'dld, eoinnion on stuni])S and 



logs. 

 Droinlus piceiis, under imrk, common. 

 Apristiis sabsidcdiiix, connnon on sand 



banks near the river; curdirolllx, one 



specimen. 

 Blechrus pndo, amongst the roots of 



grasses in dry meadows. 

 Metabli'tus ainrru-itnus, near the District 



in Maryland. 

 Plochinriv!^ tInildKx, rare, beaten from 



trees. 

 Pinarudera Jhiihata, connnon; j)lnlyrnl/is, 



rather rare. 

 Cyiinndis pilom and neglecUi, very I'om- 



mon, under stones in drv localities; 



(imci'icana, less common; elegam, very 



rare. 

 Ajjciic.s Incidnhi, not common; siiiixda, 



more frequent. 

 Ilellnomorplni bicolnr and nif/ripciniix, both 



rare. 

 Brachynxx. All species of this genus are 



more or less common, and their si)ecitic 



value is by no means established. 

 Chliniins b'iK:uf«r/ix and prashms are on 



river l)anks; niger sometimes at electric 



lights; the other species are common 



everywhere. 

 Brachylobiify lilhopJuhis, like ('lihniins j,m- 



sinns. 

 Lachnocrepit! pardllt'/iis. rather rare in 



swampy places. 

 Anatrirhis iinniitd, only a single sj)eci- 



men tound. 

 Oode.'< aiii(ir(>i(by, found ui very wet places, 



not common; (imericannx, the same, 



very common. 

 Evoleneaexarittiix, several specimens found. 



very rare. 

 Geopinus incrassalus, not rare, but found 



by imndreds at electric lights. 



